AkariXB is a bot for the decentralized Jabber/XMPP network ( http://xmpp.org ), with a GUI.
It's currently in the early-ish development stage, but it can already do several things, like (auto)joining MUC rooms and replying to commands.
Several types of custom commands can be created, such as...

Scytale is a simple P2P chat application that focuses on security, simplicity and e2e user ownership. The intention of this app is not to replace the already existing and popular messaging applications. It is targeting the users who want a secure, dependency-free and fully owned application with...

Dianara is a pump.io client, an application for GNU/linux and other desktop systems that allows users to manage their Pump.io social networking accounts without the need to use a web browser, and provides several features not available in the standard web interface. Since it's a Pump client, you...

Wire is a secure, privacy-friendly messenger for personal use. It combines useful and fun features, audited security, and a beautiful, distinct user interface. It does not require a phone number to register and chat.
- End-to-end encrypted chats, calls, and files
- Crystal clear voice and video...